Wessington Springs herald. (Wessington Springs, Aurora County, Dakota [S.D.]) 1883-1891, 1887-09-02

comoned tinkling would start an avail.
anche' A dog barking will make tho
strings OF piano-forte sound md
after all, vibration of the strings ia what
makes all the music. '''
Vibration is simply moving to and
no. as we can see the pendulum of the
CLOCK DO All things have a certain
vibration '. though We cannot always SEQ
1t. Some things have q number Of
viora''ons in their different parts, and
when two things vibrate in time With
each other, and are near each otber
though it is only air that connects them
inc movement of one is affected by the
other. The lady's voice broke tho
shade IN the chandelier because the
Two vlbrated in time with each other.
ana the motion of the voice so increased
inc motion of the glass as to loosen its
particles and allow them to fall apart,
"hen two clocks whose pendulums
nave the same range of vibration are
IN the same room, and the clock doors
are open, if the pendulum of one is set
IN motion the pendulum of the other
VIII also move. This is the reason ::
every time the pendulum of the clock
ylbrates it sends puff of air in the
direction of the pendulum of the second
clock, and these putfs, continued reg
ularly, set the pendulum of the second
clock going. When two pianos are in
the same room, if the strings of one are
struck, not only will they vibrate, but
also the corresponding strings Of the
other piano, providing that the forte
pedal of the second piano has been de-
pressed. If you whistle note into a
piano or violin, the strings of the in
strument in unison with that note will
audibly take it up.
noticed the boys carrying milk about
the streets Of London in pals which hang
from q yoke on their shoulders, and
are held off from their bodies by hoops
just below their waists. If these boys
kept up regular step, the vibration of
their bodies would increase the vibra-
ton of the milk until that was spilled.
The little fellows may not quite under
stand the philosophy of the matter,
but they know they must change their
step from time to time to keep the
milk in their pals.
a strong gust of wind will uproot a
majestic tree when it comes just in
time with the trees swing or vibration.
Some years ago there was considerable
trouble and annoyance in one of the
mills in Massachusetts, because the
walls and floors of the building were
shaken on certain days by the ma
chinery. At these times nearly all the
water in the pals would slop out by
the motion of the factory. 1t was
finally discovered that on this par
ticular day the machinery went at a
rate in keeping with the vibration of
the building, and the trouble was
readily overcome by making the ma
chinery work either slower or faster
than had been the custom.
The first iron bridge ever built was
that at Colebrooke Dale, in England.
While it was building fiddler
came along and said, II can fiddle that
bridge down." The workmen, little
alarmed, babe him fiddle away to his
hearts content. Whereupon the
musician tried one note after another
on his instrument, until lie hit one in
tune with the movement of the bridge,
and the structure began to culver so
perceptibly that the laborers begged
him to cease and let them alone, which
he did; otherwise the structure would
surely have fallen. -Haaper's Young
People. ....-.-..